Recent content by bucka

The IC puller I ordered came in the mail today and I move the UART over to the ADM-3A board. Here's an update: Power-on gets a beep, Ctrl-G gets a beep, nothing on the display, power-off draws a vertical line down the middle of the CRT. I think my next move is to probe with an oscilloscope to...

I also noticed that the UART you mentioned, AY-5-1013A, isn't what I have on my RG-512 (AY-3-1015D). Definitely looking closer, thanks!

I have the original transformer but it looks like there's a power supply on the RG-512 and an AC connection to supply it. Could there be different versions with different power configurations? Mine aligns with this version of the UG: https://vt100.net/lsi/rg512-um.pdf

Sorry guys, I missed that you were responding! @toby405 No progress. I occasionally search for a local repair shop that could do this sort of work but no luck so far. I have a goal of traveling to a repair workshop to get the courage to use the soldering iron on it :). @VERAULT socketed...

Those were excellent! I watched them all, repeating sections I worked on like checking power rails. I'd prefer a "boost" to get this thing up and running but Jerry's videos are an excellent fallback plan.

Hi, I picked up a non-working ADM-3A from eBay. It came with a surprise RG-512 Retro-Graphics card installed. I was planning on working through the repair myself but the RG-512 Retro-Graphics card is rare. I don't want to risk damaging it and I'd love to show it in action online and at a VCF...

Hi Magnedyne, I have a RG-512 I got as a surprise bonus with a non-working ADM-3A from eBay. I have two 2708 ROMs instead of one 2716. Yours may be correct as is. I don't have a ROM programmer or experience with them but should probaby get a reader/programmer/chip tester at some point. Is...